How do i protect my alternation from this drawing too much current i have a large lifepo4 battery bank?

That’s exactly the point. If you use it to charge from a flood/AGM starting battery, it will limit the draw to the D.C.-D.C. charger rating. So if you have a 60A alternator, choose 20-30A charger

I dont want my battery to be used to start my rv. does the charger contain a backfeed diode (to prevent power coming from the rv battery)?

A reverse current from the RV battery cannot occur. In addition, the Orion-TR Smart is isolated galvanically separated.

I’ve connected the input terminals to the starter battery and confirmed 14.4 v at the input terminals. Why won’t my unit turn on? Defective unit?

There is a green connector inside the box to connect to the "remote" on the left side of the unit. It cannot run if there is a discontinuity between the 2 pole of this remote.

Does this have a built in battery protect, or do i need to add this separately?

Not sure what you mean. It does monitor voltage levels and you can set specific charging profiles. I believe it may have reverse polarity protection in case you hook up the battery wrong.

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🔌 Power up smarter, not harder — stay charged, stay ahead.

SCALABLE POWER BOOST - Connect multiple units in parallel to amplify output—grow your system without limits.
PLUG PLAY INSTALLATION - User-friendly screw terminals make setup quick and tool-free for busy pros on the move.
SMARTPHONE POWERED CONTROL - Monitor and tweak charging settings anytime via Bluetooth and the VictronConnect app.
EFFORTLESS DUAL BATTERY MASTERY - Seamlessly charge your service battery from your start battery—perfect for vehicles & boats.
UNIVERSAL BATTERY COMPATIBILITY - Optimized for both lead acid and lithium batteries, adapting to your power needs.

The Victron Energy Orion-Tr Smart DC to DC Charger delivers a professional 30A, 360W isolated charging solution for dual battery systems. Featuring Bluetooth connectivity for real-time monitoring and control via the VictronConnect app, it supports both lead acid and lithium batteries. Its scalable design allows multiple units to run in parallel, while easy screw terminal installation ensures fast setup in vehicles or boats.

Reviews

P**H

Great bit of kit

Top quality great options within software. I’m impressed although only fitted for a couple of weeks it is working amazingly well thus far

13.08.2025

C**J

Brilliant

Brilliant piece of equipment. I had a fault with it were it was registering 12v all the time so not switching on. But after a hard reset by disconnecting all the wires this solved the problem.

18.06.2025

A**R

Good product

Quality victron it's the best I'm 100% recommendations good stuff

9.01.2025

B**K

DC to DC charger

This is an excellent bit of kit very easy to setup and use and it very well made

26.08.2024

R**N

Faulty item

The media could not be loaded. The items didn’t work and return window is close

10.03.2024

W**L

Good product

Good product, but I changed my mind on this one and went for a Renorgy Inverter instead,So this seller deducted £33.74 to send it back.

24.12.2023

M**E

Victron

Thought I would pay more for a top product .. but no not me, first I ordered the victron solar charger, it came with a broken seal and bits of grass inside the box, then I ordered the victron dc dc charger, and that turned up without the remote switch plug... so paying more means sometimes your giving your money to people who can't do their job

8.07.2021

R**N

Uk Vat if order

£50 vat and clearance money you have to pay for this. Get in uk.

19.10.2022

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Manufacturer	Victron Energy
Brand	Victron Energy
Model	ORION-TR SMART 12/12-30A (360W) ISOLATED DC-DC CHARGER
Product Dimensions	13 x 7.01 x 18.59 cm; 1.35 kg
Item model number	ORI121236120
Manufacturer part number	ORI121236120
Voltage	12 Volts
Wattage	360 watts
Item Weight	1.35 kg

Victron EnergyOrion-Tr Smart DC to DC Charger (Bluetooth) - 12/12-Volt 30 amp 360-Watt - Battery Charger for Dual Battery Systems - Isolated

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